What oil weight?

[Dave 1964]

I see it clearly says SAE 30 on the engine cover for warm weather. But shouldn't it be 10w30. Not just strait 30 weight. I've only used strait 30 in a lawn mower

 

[Rodney Williams]

10W30 will be fine.

 

[fhhuber]

10-30 is a multi-season oil. Winter and summer. It behaves much like 10 weight oil when its cold and much like 30 weight when its hot.

The outboard sort of expects you to not use it much in cold weather.

 

[Dave 1964]

Thanks for the info

 

[bruceb58]

What engine is this for? BTW, it's called viscosity not weight. No such thing as "weight" when describing motor oil.

 

[Dave 1964]

It's for a 1976 mercruiser 120

 

[Alumarine]

Straight 30 or 15W40 or 25W40. would all work well.
Marine or Rotella.

 

[Grub54891]

I figure the ones I have, have been running 30 weight oil since 1985, so why change it differently now....